We report the de Haas--van Alphen (dHvA) experiment on the filled skutterudite ${\mathrm{PrFe}}_{4}{\mathrm{P}}_{12}$ exhibiting apparent Kondo-like behaviors in the transport and thermal properties. We have found enormously enhanced cyclotron effective mass ${m}_{\mathrm{c}}^{*}=81{m}_{0}$ in the high field phase, which indicates that ${\mathrm{PrFe}}_{4}{\mathrm{P}}_{12}$ is the first Pr compound in which really heavy mass has been unambiguously confirmed. Also in the low field nonmagnetic ordered phase (LOP), we observed the dHvA branch with ${m}_{\mathrm{c}}^{*}=10{m}_{0}$ that is quite heavy taking into account its small Fermi surface volume (0.15% of the Brillouin zone size). The insensitivity of mass in LOP against the magnetic field suggests that the quadrupolar interaction plays a main role both in the mass renormalization and the LOP formation.